The sale, whose financing has yet to be finalized, marks the biggest price tag for an office building in the U.S. since Google (NASDAQ:GOOG) paid $1.8 billion for a complex in New York’s Chelsea neighborhood in 2010, Reuters noted.

The 820,000-square foot Sony tower, originally built by AT&T (NYSE:T) and located on Madison Avenue in midtown Manhattan, includes both office and retail space. Sony purchased the building two decades ago for $236 million.

Sony will lease its office space from the new owners for at least three years while it examines relocation options. The deal should be completed by March. Sony indicated that it will realize net cash proceeds of about $770 million after retiring debt linked to the building.